RMA Therapeutic Modalities and Mobility Aids

Question 1

When crutches are fitted correctly, the top of the axillary bar should be:

Accepted Answer

About 1.5–2 inches (2–3 fingerbreadths) below the armpit

Answer

A gap of about 1.5–2 inches (two to three fingerbreadths) between the axilla and the crutch top prevents pressure on the brachial plexus nerves, which can cause 'crutch palsy.' Body weight should rest on the hands, not the armpits.

Question 2

A patient with a weak left leg is learning to use a cane. On which side should the cane be held?

Accepted Answer

Right side (unaffected side)

Answer

The cane is held on the strong (unaffected) side. It moves forward together with the affected leg, widening the base of support and mimicking a natural gait.

Question 3

For an acute ankle sprain in the first 24–48 hours, which therapy is generally recommended, and why?

Accepted Answer

Cold, to cause vasoconstriction and reduce swelling

Answer

Cold constricts blood vessels, which reduces swelling, bleeding into tissues and pain right after an injury. Heat causes vasodilation and is usually saved for later stages to improve circulation and relieve stiffness.

Question 4

When climbing stairs with crutches, which part moves up to the next step first?

Accepted Answer

The unaffected (strong) leg

Answer

The rule is 'up with the good, down with the bad.' Going up, the strong leg leads, then the crutches and affected leg follow. Going down, the crutches and affected leg go first.

Question 5

Why is a coupling gel applied during therapeutic ultrasound treatment?

Accepted Answer

To transmit sound waves efficiently, since they don't travel well through air

Answer

Therapeutic ultrasound uses high-frequency sound waves to produce deep heat in tissues. Air blocks ultrasound transmission, so a coupling gel is needed to conduct the waves from the transducer into the body.

RMA Practice Test

RMA Practice Test

RMA Therapeutic Modalities and Mobility Aids